168-Tooth Flywheel For 2001-2007 Chevrolet Silverado & Suburban, GMC Sierra & Yukon 4.8L 5.3L 6.0L LS Swap, OE 12561680

A 168-Tooth Flywheel for the LS-Powered Silverado, Sierra, Suburban, and Yukon

This is a 168-tooth manual transmission flywheel built for the 2001-2007 Chevrolet Silverado 1500, 1500HD, 2500, 2500HD, 3500, and 3500HD, the 2001-2007 Chevrolet Suburban, and the 2001-2007 GMC Sierra 1500, 1500HD, 2500, 2500HD, 3500, and 3500HD and GMC Yukon, all with the 4.8L, 5.3L, or 6.0L Vortec V8, cross-referenced to OE number 12561680. If you're building an LS swap or replacing a worn flywheel on one of these trucks, this flat-step, 6-bolt flywheel is a direct fit for the Gen III/IV small block.

Why This Flywheel Is a Common LS Swap Part

GM's Gen III and Gen IV small block V8 engines, commonly known as the LS family, were installed across an enormous range of Chevrolet and GMC trucks and SUVs during this era, all sharing the same bolt pattern and flywheel specification regardless of which specific model or displacement the engine came out of. Because this 168-tooth, flat-step flywheel matches the crank bolt pattern used across the 4.8L, 5.3L, and 6.0L versions of this engine family, it's become a popular choice not just for factory replacement on these trucks but for LS swap projects where the engine is being installed into a different vehicle entirely, which is why it's frequently sold and searched under both use cases.

Key Features

• Cross-referenced to OE number 12561680
• 168-tooth ring gear for manual transmission applications
• Flat-step design with 6 crank bolt holes
• Made from steel for durability under repeated clutch engagement

Specifications

• Type: Flywheel
• Transmission type: Manual
• Ring gear count: 168 teeth
• Flywheel step: Flat (0.0")
• Crank bolt holes: 6
• Material: Steel
• Condition: New

Compatibility

Fits the 2001-2007 Chevrolet Silverado 1500, 1500HD, 2500, 2500HD, 3500, and 3500HD, the 2001-2007 Chevrolet Suburban, and the 2001-2007 GMC Sierra 1500, 1500HD, 2500, 2500HD, 3500, and 3500HD and GMC Yukon, all with the 4.8L, 5.3L, or 6.0L Vortec V8. Because this flywheel is also commonly used in engine swap applications outside of these factory vehicles, confirming your specific engine's bolt pattern and flywheel step against the OE number above is worth doing before ordering.

Signs Your Flywheel Needs Replacing

A worn or damaged flywheel on these trucks typically shows up as a grinding or chattering noise when engaging the clutch, a clutch pedal that feels different than it used to, or visible scoring and hot spots on the flywheel's friction surface when the transmission is out for a clutch job. Because the flywheel's ring gear is also what the starter motor engages to crank the engine, worn or chipped teeth can also cause a grinding noise specifically when starting the truck.

Why Replace the Flywheel During a Clutch Job

Since accessing the flywheel requires removing the transmission, most shops and experienced owners replace or resurface the flywheel any time the clutch is already apart, rather than reusing a flywheel that's shown any sign of wear and risking a second transmission removal soon after. A fresh flywheel also gives a new clutch disc a true, unworn surface to grip, which helps the new clutch engage smoothly rather than compensating for an already-worn flywheel face.

Installation Notes

Installing this flywheel means removing the transmission to access the bell housing, unbolting the old flywheel from the crankshaft, and torquing the new flywheel down with the six crank bolts in the correct sequence and to the manufacturer's specification. Because a flywheel is intentionally imbalanced to work with a specific crankshaft, using new bolts rather than reusing worn ones is generally recommended given the stress this connection sees during clutch engagement.

Ordering Information

This flywheel is in stock and ships ready to install. Our Shipping Information page covers current timelines, and our Warranty and Returns pages explain what to do if anything isn't right on arrival. Not sure this matches your specific engine and swap application? Our Request a Part page is the fastest way to confirm before you order.

Related Parts

This flywheel is listed in our Chevrolet and GMC collections, along with our Engine Parts collection, where you'll find other components for these trucks and LS swap builds.